Strip forming means



Sept. 12, ,1944. R, NEW'TON 2,358,278

sTRI-P FORMING MEANS Filed 'March 2, 1942 2 sheets-'sheet 1 INVENTOR.

[0a/ed ENewZbm BY Patented Sept. 1'2, 1944 UNITED STATE s "PATENT OFFICE STRIP FORMIN G Loweu 1t. Newton, chieagmfnll, assigner to 11ndustrial Patents Corporation, Chicago, Ill., a

corporation of Delaware Application March 2, 1942, y'Serial No. 432,925

8 Claims.

This invention relates to a die forming machine 'and more particularly to a machine for processing straight metal strips to form rthemginto circular bands.

It is an object of this invention to bend a straight metal strip into a circular shape and then press it to have a flared portion around one rim. The ring thus formed kmay be further yshaped so it may be Iapplied to a paper disc as :shown in the Walter Patent No. 1,959,971.

The invention here shown performs a partial' :shaping of the metal strip to be attached to the paper disc and may form one of the operating steps accomplished in a machine like thatdisfclosed in the Swangren Patent No. 2,148,247.

This invention is an improvement on the apparatusfor performing the initial operation in this 'patented machine wherein the straight strip is Aformed into a circular band and is thereafter subjected to a shaping operation during which the :upper surface of the ring is flared outwardly.

Referring to the drawings, Figure 1 is a diagrammatic View of the essential elements of the machine.

Figure 2 is aperspective view partlybroken :away of the plunger, collar and feed mechanism.

Figure 3 is an elevation partly broken away showing a strip about to be fed into position be- '.'tween the collanand plunger, Vvm'th the presser gpoised above this assembly,

Figure 4 is an elevation of the machine showing the plunger and the ring of the" material elevated into lthe turret with the pressing memlber about to engage the strip to form the outwardly curved flange.

Figure 5 is an elevation of the machine, partly :in section, showing the partially formed strip restring in the turret with the plunger and pressing :means being retracted.

Figure 6 is a side elevation of the strip which :is fed to the machine.

Figure 7 is a perspective of the ring produced :in this apparatus.

The Walter/patent above mentioned teaches The teeth `f1arigethat`niy be trimpedove'r the edge of a paper body so that the paper disc may be firmly held in position on'the package,

A .The strip III is preferably put through a plurality of forming operations to work it into the proper shape, and as shown in the Swangren patent this may be done in one machine. After the strip is initially Vformed into a ring with its upper edge outwardly flared, the ring is conveyed to the various working stations by a turret which has an intermittent motion timed `to cooperatewith the plunger andpressing devices which form 'the die means. f

The 4present `invention is an improvement on the machine shown in the Swangren patent and provides a new means for performing the initial ring forming and ilaring'operation.` Y

In this'present invention, the vstrip'is formed l-into'a ring by driving it into a confined channel until the'ends of strip overlap slightly. After the *ring'is formed, a `plunger mechanism'is driven upwardly into a turret to, place the ring in a working opening provided in'theturret. When thering is so positioned, a pressing member is reciprocated downwardly from above and the upper edge of the ring is flared outwardly over the sides of the opening in theturret. 'I'he'plunger 'and pressing elements may Vthen be retracted and the "ring will remain in the turret because the flaredportion cannot pass through it. -The turret is then 'driven one step around the machiner tov convey'the ring to the next operating posiy tion while another'strip is being simultaneously driven into the ring forming channel.

Referring to Figure 3, a plunger I4 is mounted 'for vertical reciprocation and the plunger has a groove YI5 .cut into itsfree upper'I end to provide a shoulder I B. A collar I1 is'slidably'mounted over the plunger I4 and is guided in its reciprocati'on along the'plun'g'er by'pins` I8 xed to the flange' I9 integral with the Acollar I l. The pins I8V reciprocate through suitable apertures 2B Y 'formed in ang'e 2| integral with the plunger and 'the pin I8 is provided with a head 22 which limits the Ymovement of the collar such that the yfree end 23 of the collar may be moved .to-extend` somewhat beyond thefree end or upper end of the plunger. Springs'2`4V disposed around-pins I8 are confined between iianges I9 and-Zito'nor- `mally urge the collar upwardly along the-plunger.

An open topped channel 25 is provided between the collar Il and plunger I5 byrreasonof the groove I6 being-cut intothe plungerand the collar I 1 is provided with an opening26-which is directed tangentially into'the channel v25. 'The 34 upon which the feed bar reciprocates also cooperates with the guide 30 to make one of the side walls for passage 3| to confine the strip so that it cannot buckle out of shape as the feed device forces the strip into the channel and the strip is confined on top by flange 35 integral with guide 30. The feed tooth 32 is pivotally mounted on the feed bar 33 and is resiliently urged against a stop pin 36 by spring 31 so that lon its return stroke, the tooth may by-pass the 4vstrip of metal fed into passage V3| to be subsequently forced into the channel 25.

The strip being driven into the channel 25 is 'curled around until its ends slightly overlap and when the ring has been completed and the feed bar'has started to retract, the plunger is lifted to raise the ring into the opening 40 in turret 4I. The opening 4G must of course be aligned with the plunger so that the circular strip will nt neatly into the opening and'the plunger continues to driveupwardly asthe free end 23 of the' collar engages the under surface of the turret openinguntil the plunger attains the position shown in Figure 4. In this position, the upperedge of the strip extends above the surface of the turret and the lower portion of the strip is engaged between the `walls of` groove |5 formed in the plunger and thecpening 46 of the turret,

while the teeth bear upon' the shoulder I5. V It will bernoted that the groove |55 is not as deep as the strip I iswide so that the upper edge of the ring stands well above the top Vend of the plunger.

Whenvtheringrhasbeen driven to position in the turret, a presser 4,5 may then bedriven downwardly into the ring to are thestrip outwardly and as shown in Figure 4 thepresserhas a curved die surface 46 forV engaging invsidepof the ring to bendit outwardly. After .the Vpresser has been driven down into the ring to'producerthe initial flaregven the ring, Figure 5,Y the plunger and presser may :both be retracted and the partially formed ring remains in the turret opening l40. The flared upper edge. of the ring would prevent it from following the plunger on its return stroke and the opening 4D engages the outer wall of the ring sufficiently to prevent the ring from binding to the presser and following it upwardly as it is retracted. l I

VAs soon as the plunger and presser have been retracted sufficiently to withdraw them from the plane of the turret, the turret may be :given a forward feeding movement to carry the partially formed ring to the next operating position. The plunger continues its downward movement to the bottom of its stroke in which position the shoulder I6 is aligned with the bottom of the feed passage 3| whereupon a new strip may be forced into the channel 25. It willbe noted that as the plunger is retracted the collar is urged upwardly by the springs24 until its free end extends beyond the free end of the plunger so that the forming channel 25 is again established.

A diagrammatic showing of a drive mechanism Yto accomplish the desired movements is shown in vligure 1 `wherein the drive wheel 50 is connectedv aesazv by link to the feed bar 33. The feed bar is driven forwardly during one-half of the revolution of wheel 50 and is given a feed stroke to justV y plunger is raised and lowered during one-half a revolution of the cam wheel 52. The plunger must .be held stationary during the other half 0f Y the revolution of cam wheel 52 while the feed bar 33 drives the-strip I0 into the channel.

The presser 45 is driven from cam wheel 55 by cam follower 5E and the reciprocating connecting link 51 and the presser are timed to cooperate properly with the plunger. To accomplish this,` the cam wheel 55 is shaped to drive lpresser 45 into the metal ring just after it is positioned within the opening 40 of the turret.

The presser, immediately after engaging the'ring to flare the upper edge, is retracted.

The drive means 50, 52 and 55 may be driven by any suitably powered means and with the drive arrangement shown in Figure l, the wheels 50, 52 and 55 must be driven at the same R. P. M. Wheel 50 must give feed'bar 33 a drive stroke of a length to force vthe strip into'the channel, cam

" 52,must lift the plunger |5 from its position in front of the strip feed upto place the curled strip in the turret opening 4|),Y and cam 55V must drive the' presser 45 into the ring held in the turret by the plunger to are the 'strip.` The sequence of operation ofthe various parts has been fully set forth above and wheels 50, 52 and 55 are timed with respect to each otherto get the desired mode of operation. f' Y The strip having' been/curled into a ring and ared as above des`cribed,.may now be carried by the turret to the next operating station where a Vfurther die forming step may be performed.

The operation and 'construction of this'inventionwill be readily understood from the description 'given above. "Ihis is one disclosure'of the invention and one mannerv of performing it,

-other modifications may occur to those skillediin the art, all of which are vcontemplated to be within the scope of the following claims.

I claim; Y l i 1. A machine forshaping a metalfstrip comother, one of said plunger alndcollar elements having a. groove cut in the free end'thereof, said groove being of a width substantially equalto the Widthof the strip being shaped, jresilient means to urge the other of said plunger "and collarv elements'toward the free end to coversaid'groove to channel, a pressing member forming another eleprovide a channel, said collar having an opening therein through which a strip maybe 'fed into the channel, means to feed Aa strip into the channelwhereby itis forcedto'take the shape ofthe ment of the-die means, said presser being reciprocable relatively toward said grooved element for engaging'the shaped strip in the channel,

Ymeans fordriving said grooved'element and said pressing member together,u and means positioned between the grooved element and the presser member to receive the strip in -saidA channel and cooperating with said grooved element to hold the strip while said presser member is driven into groove being of a width substantiallyequal to the width of the strip :being shaped, resilient means. v

torurge the other ofsaid plunger and collar ele- `ments toward the free end tocover said groove `to provide a channel, said collar having an `openving therein through which a strip may be fed into the channel, said opening being disposed to direct the strip tangentially into said channel,

vmeans to feed a strip into the channel whereby it is forced to take the shape of the channel, a

'pressing member reciprocable relatively toward saidigrooved element for engaging the strip in thel channel, means for driving saidl grooved element and said pressing member together, and means positioned between the Ygrooved element and the presser to receive the strip in said channel and cooperating'with said grooved element to hold the strip while said presser member is driven into engagement withV the strip to further shape it.

3. A machine for shaping a metal strip comprising cooperating die means including a plunger having a groove formed in one end thereof, said groove being of a width substantially equal to the width of the strip being shaped, a collar mounted around said plunger, resilient means to urge said collar toward the grooved end of said plunger, the free end of said collar extending at least to the end of said plunger whereby a `channel is formed between the plunger and collar by reason of said groove, said collar having an opening therein through which a strip may-be fed intothe channel, means to feed a strip into the channel so that it is forced to take the shape of the channel, a pressing member reciprocable relatively toward said grooved plunger for engaging the strip in the channel, means for driving said plunger and said pressing means together, and means positioned between the plunger and presser to receive a strip in said channel and cooperating with said plunger to hold the strip while said presser member is driven into engagement with the strip to further shape it.

4. A machine for shaping a metal strip comprising cooperating die means including a plunger having a groove formed in one end thereof,

said groove being of a width substantially equal to the Width of the strip being shaped, a collar mounted around said plunger, resilient means to urge said collar toward the grooved end of said plunger, the free end of said collar extending at least to the end of said plunger whereby a channel is formed between the plunger and collar by reason of said groove, said collar having an opening therein through which a strip maybe fed into the channel, means to feed a strip into the channel so that it is forced to take the shape of the channel, a pressing member reciprocable relatively toward said grooved plunger for eny gaging the strip in the channel, means for driving said plunger and said pressing means together, a plate means positioned between the grooved plunger and the presser, said plate means having an aperture therein toreceive the strip in said channel and the said plate means cooperating with said grooved plunger to hold the strip while said presser member is driven into engagement with the strip to further shape it, said collar giungere? Seid Dlefef A v1? investeer fre. the'. ei'vei eef the n? and Plugerrmeans move together to position the strip in said aperture, l

prising @Operatie-e' die .meele including e plunger and aereeveellt ereundihewfrree ,elfld theree sa id groove being Jo f awidth substantially equal tothevwidth of thefstripbeing sh' a1oe d,a,4v ange integral with saidplunger and spacedV from said groovedend, a collar slidably. mounted over A,the

free enelY ef seid plunger. e fieriee ntegralwvith' 'said cellar, a plurality ei pine xed t0- One ef vSaid flanges and passing through apertures provided in the other ofsaid Vflangesto guide themovement of the collarY as L it Islides nthe'plunger, means on said pins to limit the movement of the collar, said collar extending at leastrto the free end of said plunger when it is. urged to the furthest limit of its possible movement, spring means between said flangesto urge the collar'toward the grooved end ofthe plunger whereby 2f channel is formed lby vsaidgroove betweenk the plunger and thecollar, ksaid collar having van opening therein through which a strip V may be fed into the channel, means to feed arstrip into the channel whereby it is forced to take the shape of the channel, a pressing member reciprocable relatively toward said grooved plunger for en- -gaging the strip in the channel, means for driving said plunger and said pressing ymember together, and turret means positioned between a grooved element and the presser to receive the strip in said channel and cooperating with said grooved plunger to hold the strip while said presser member is driven into engagement with the strip to further shape it.

6. A machine for shaping a metal strip comprising cooperating die means including a plungerhaving a collar mounted therearound, said collarI and plunger being movable one relative to theother, said groove being of a width substantially' equal to the Width of the strip being shaped, one:V

of said plunger and collar elements having a. groove -cut in the free end thereof, resilient means to urge the other of said plunger and collar ele-1 ments toward the free end to cover said groove to provide a channel, said collar having an opening therein through which a strip may be fed into the channel, said opening being disposed to direct the strip tangentially into said channel, means to feed a strip into the channel whereby it is forced to take the shape of the channel, a pressing member reciprocable relatively toward said grooved element for engaging the strip in the channel, stripping means interposed between said plunger and said pressing member for vrelatively lifting the pressed ringfro'm said plunger as the plunger is retracted, said stripping means driving said resiliently mounted means before it when the plunger and presser member are reciprocated toward each other, and means for reciprocating said plunger and pressing ymeans toward and away from each other.

7. A machine for shaping a metal strip comprising cooperating die means including a plunger having a groove formed in one end thereof,y said groove being of a width substantially equal to the width of the strip being shaped, a collar mounted around said plunger, resilient means to urge said collar toward the' grooved end of said plunger, the free end of said collarxtending at least to the end of said plunger whereby a channel is formed between the plunger and co1- lar by reason of said groove, said collar having an opening therein through which a strip may b e f ed into the channel, means tofeed av strip into the channel so that itis forcedto takeftheshape of the channel, a pressing'member reciprocable relatively toward said :grooved plunger for engag- "ing'the strip in the channehlstripping means interposed betweenV said plunger'and -said pressing kmember 'for relatively lifting the -pressed ring from saidplunger as the plunger is retracted, said stripping meansdriving said resiliently mountedy means beforeit when the plunger and Vintegral With said plunger and spaced from said grooved end, a collar slidably mounted Vover the free end of said plunger, a 'flange integral with said collar, a plurality of pins fixed to one of said flanges and passing'through apertures provided in the other of saidvflanges to guide the movement of the collar as it slides on the plunger,

Ymeans on said pins to limit the movement of the collar, said collarextendingat, least to the free `en dfof said plunger When it is urged to the fur- 'thest lirnit, of its possiblel movement, spring -means Vbetweensaid flanges to urge the collar toward the grooved end of the plunger whereby laf-channel is'formed by said groove between the plunger and the collar, said collar having an openingtherein through which a strip maybe fed into the channel, means to feed a strip into the channel whereby it is forced to take the shape of the channel, a pressing member reciprocable relatively toward said grooved plunger for engaging the strip inthe channel, stripping means interposed between said plunger and said pressing member `for relatively lifting the pressed ring from said plunger as the plunger is retracted, said stripping means driving said resiliently mounted means before it when the plunger and presser member vare reciprocated toward each other, and means for reciprocating said plunger and pressing means toward and away from each other. Y

' LOWELL R. NEWTON. 

